Simplify `create bpool` and create rpool/DATA for docker-volumes

✅ Add
-o autotrim=on: Enables continuous TRIM support for SSDs, improving
long-term performance.

-O recordsize=128K: Ensures boot filesystem stays within GRUB's block
size limit (critical when using large_blocks).

🔁 Remove
    Individual -o feature@...=enabled lines: Since compatibility=grub2
automatically enables them, listing them is redundant.

blend_helpers

@@ -488,31 +488,21 @@ image_format_partitions_zfs() {
 
 	act "create the zfs boot pool"	
 	#zpool create -f -m none \
-	zpool create -f \
-		-o cachefile=${zpool_cache_dir}/zpool.cache \
-		-o ashift=${ashift} -d \
-		-o feature@async_destroy=enabled \
-		-o feature@bookmarks=enabled \
-		-o feature@embedded_data=enabled \
-		-o feature@empty_bpobj=enabled \
-		-o feature@enabled_txg=enabled \
-		-o feature@extensible_dataset=enabled \
-		-o feature@filesystem_limits=enabled \
-		-o feature@hole_birth=enabled \
-		-o feature@large_blocks=enabled \
-		-o feature@lz4_compress=enabled \
-		-o feature@spacemap_histogram=enabled \
-		-o feature@zpool_checkpoint=enabled \
-		-O acltype=posixacl \
-		-O canmount=off \
-		-O compression=lz4 \
-		-O devices=off \
-		-O normalization=formD \
-		-O relatime=on \
-		-O xattr=sa \
-		-O mountpoint=legacy -o altroot=${strapdir} \
-		${bpool_name} ${raid} /dev/disk/by-id/${disk_name}-part${boot_part_number} /dev/disk/by-id/${mirror_disk}-part${boot_part_number}
-
+  zpool create -f \
+    -o cachefile=${zpool_cache_dir}/zpool.cache \
+    -o ashift=${ashift} \
+    -o autotrim=on \
+    -o compatibility=grub2 \
+    -O acltype=posixacl \
+    -O canmount=off \
+    -O compression=lz4 \
+    -O devices=off \
+    -O normalization=formD \
+    -O relatime=on \
+    -O xattr=sa \
+    -O mountpoint=legacy -o altroot=${strapdir} \
+    -O recordsize=128K \
+    ${bpool_name} ${raid} /dev/disk/by-id/${disk_name}-part${boot_part_number} /dev/disk/by-id/${mirror_disk}-part${boot_part_number}
 
 	act "create the zfs root pool"
 	
@@ -545,6 +535,7 @@ image_format_partitions_zfs() {
 	notice "zfs system installation"
 	act "create filesystem datasets to act as containers"
 	zfs create -o canmount=off -o mountpoint=none ${rpool_name}/ROOT
+	zfs create -o canmount=off -o mountpoint=none ${rpool_name}/DATA
 	zfs create -o canmount=off -o mountpoint=none ${bpool_name}/BOOT
 
 	act "create filesystem datasets for the root and boot filesystems" 
@@ -600,11 +591,16 @@ image_format_partitions_zfs() {
 		-o com.sun:auto-snapshot=false \
 		${rpool_name}/var/cache
 
+  # Split docker data from images
 	zfs create \
 		-o mountpoint=/var/lib/docker \
 		-o com.sun:autosnapshot=false \
 	       	${rpool_name}/docker
 
+	zfs create \
+		-o mountpoint=/var/lib/docker/volumes \
+    ${rpool_name}/DATA/docker-volumes
+
 	zfs create -o mountpoint=/var/log      ${rpool_name}/var/log
 	zfs create -o mountpoint=/var/snap     ${rpool_name}/var/snap
 	zfs create -o mountpoint=/var/spool    ${rpool_name}/var/spool